I think one will find very variegated results for that question, it will depend a lot on what brick and what mortar. I saw of tests of a 1715 about 90 m tall tower for a church with gypsum mortar that had short stub strength of 35 kgf/cm2. Normally masonry built in 1936 in some industrialized context should have far bigger strengths, twice or thrice that, even accounting (ordinary) degradation of strength with age.